Day: December 1, 2020

497-25-6, In an article, published in an article,authors is Chahen, Ludovic, once mentioned the application of 497-25-6, Name is Oxazolidin-2-one,molecular formula is C3H5NO2, is a conventional compound. this article was the specific content is as follows.

Comprehensive monitoring of MEA degradation in a post-combustion CO2 capture pilot plant with identification of novel degradation products in gaseous effluents

A pilot plant campaign was performed to study MEA degradation in CO2 capture conditions and anticipate potential degradation products emissions to the atmosphere in industrial case. Aqueous 30% wt MEA was cycled between absorption and regeneration steps during 1700 h in the presence of a synthetic flue gas containing 81% of N2, 14% of CO2, 5% of O2, 97 ppm of NO, 9 ppm of SO2 and 5 ppm of NO2. Specific methods (sampling, sample conditioning and analysis) were developed to improve degradation products identification and to provide a quantification of targeted compounds in liquid phase and above all in absorber and stripper gas effluents. Especially, trace elements were detected in liquid phase thanks to Head Space-Solid Phase MicroExtraction (HS-SPME) and liquid-liquid extraction with ChemElut cartridges and in gas phase thanks to adsorbent tubes of different type: Sep-Pak for aldehydes and ketones, Orbo 60 for N-nitrosodimethylamine, Tenax and active charcoal for non-specific adsorption. 32 degradation products were identified in liquid phase and 38 in gas phase, 17 of which for the first time, especially derivatives of pyridine and oxazolidine, 1H-pyrrole and a new nitrosamine, the N-nitroso-2-methyl-oxazolidine.

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Oxazolidine – Wikipedia,
Oxazolidine | C3H409NO – PubChem

 

444335-16-4, Chemistry is the experimental and theoretical study of materials on their properties at both the macroscopic and microscopic levels.In a patent£¬Which mentioned a new discovery about 444335-16-4

9,9,10,10-TETRAFLUORO-9,10-DIHYDROPHENANTHRENE HEPATITIS C VIRUS INHIBITOR AND APPLICATION THEREOF

The present invention belongs to the field of chemical pharmaceuticals, and specifically relates to compounds represented by formula I having a 9,9,10,10-tetrafluoro-9,10-dihydrophenanthrene structure and being able to inhibit hepatitis C virus activity, or a pharmaceutically acceptable salt, isomer, solvate, crystal or prodrug of said compounds, a pharmaceutical composition containing said compounds, and an application of said compounds or composition in the preparation of a drug. The compounds of the present invention have a good HCV inhibitory effect.

444335-16-4, Each elementary reaction can be described in terms of its molecularity, the number of molecules that collide in that step. The slowest step in a reaction mechanism is the rate-determining step.you can also check out more blogs about 444335-16-4

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Oxazolidine – Wikipedia,
Oxazolidine | C3H2683NO – PubChem

 

497-25-6, Name is Oxazolidin-2-one, belongs to oxazolidine compound, is a common compound. 497-25-6In an article, authors is Akkarachalanont, Phattara, once mentioned the new application about 497-25-6.

New reactive extraction based reclaiming technique for amines used in carbon dioxide capture process from industrial flue gases

A new reclaiming technique based on reactive extraction for removal of heat stable salts (HSS) from monoethanolamine (MEA) used in carbon dioxide (CO2) capture process has been developed. The extraction process was based on the use of tri-n-octylamine (TOA), Aliquat 336, OH- modified Aliquat 336, a two-step extraction (modified Aliquat followed by TOA), and mixed extractant (modified Aliquat and TOA) in 1-octanol diluent. The best parameters were 69% OH- modified Aliquat, two-step extraction, and mixed extractant (modified Aliquat and TOA) and under optimum extraction conditions were able to improve the extraction efficiency of the original Aliquat and TOA to over 90%. The two-step extraction and mixed extractant were also capable of managing Cl- contamination in MEA solution. Extraction was found to be independent of temperature whereas efficiency reduced with increase of CO2 loading. Therefore, it is recommended to apply this extraction technique to the lean MEA stream after the rich/lean heat exchanger either with or without cooling. Regeneration of used extractant (OH Aliquat) was implemented and optimized with the use of 4 kmol/m3 NaOH. In addition to HSS removal, the new extraction technique was also able to remove major nonionic degradation products also by up to 90%.

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Oxazolidine – Wikipedia,
Oxazolidine | C3H280NO – PubChem

 

Catalysts are substances that increase the reaction rate of a chemical reaction without being consumed in the process. 497-25-6, Name is Oxazolidin-2-one, molecular formula is C3H5NO2, 497-25-6, In a Article, authors is Niemi, Teemu£¬once mentioned of 497-25-6

Direct assembly of 2-oxazolidinones by chemical fixation of carbon dioxide

The reaction of beta- and gamma-haloamines with carbon dioxide to give pharmaceutically relevant 2-oxazolidinones and 1,3-dioxazin-2-ones, was found to proceed efficiently in the presence of a base and in the absence of catalyst. After optimization of reaction conditions, the system was successfully expanded to a variety of haloamines, even at multigram scale. The reaction was further studied in silico by DFT calculations. The reaction of beta- and gamma-haloamines with carbon dioxide to give pharmaceutically relevant cyclic urethanes was found to proceed efficiently in the presence of a base and in the absence of catalyst (see figure). After optimization of reaction conditions, the system was expanded to a variety of haloamines, even at a multigram scale. The reaction was further studied in silico by DFT calculations.

Balanced chemical reaction does not necessarily reveal either the individual elementary reactions by which a reaction occurs or its rate law.497-25-6. In my other articles, you can also check out more blogs about 497-25-6

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Oxazolidine – Wikipedia,
Oxazolidine | C3H861NO – PubChem

 

Chemistry is the science of change. But why do chemical reactions take place? Why do chemicals react with each other? The answer is in thermodynamics and kinetics.In a document type is Article, the author is Evans, David A. and a compound is mentioned, 145589-03-3, (R)-4-Benzyl-3-(3-methylbutanoyl)oxazolidin-2-one, introducing its new discovery. 145589-03-3

The Asymmetric Synthesis of alpha-Amino and alpha-Hydrazino Acid Derivatives via The Stereoselective Amination of Chiral Enolates with Azodicarboxylate Esters.

The utility of azodicarboxylate esters as (+)NH2 and (+)NH-NH2 synthons in highly diastereoselective reactions with chiral carboximide-derived enolates has been demonstrated.The lithium enolates derived from 4-substituted N-acyl 2-oxazolidinones were found to react with di-tert-butyl azodicarboxylate (DBAD) to afford the derived 2-hydrazido carboxylic acid derivetives in yields in excess of 90 percent.The diastereoselectivities of these reactions ranged from 97percent to greater than 99percent.The subsequent transformation of these adducts to both alpha-hydrazino and alpha-amino acids in enantiomeric purities in excess of 99percent is described.

But sometimes, even after several years of basic chemistry education, it is not easy to form a clear picture on how they govern reactivity! Read on for other articles about 196603-96-0!, 145589-03-3

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Oxazolidine – Wikipedia,
Oxazolidine | C3H2588NO – PubChem

 

102029-44-7, An article , which mentions 102029-44-7, molecular formula is C10H11NO2. The compound – (R)-4-Benzyl-2-oxazolidinone played an important role in people’s production and life.

Stereoselective total synthesis of marine cyclodepsipeptide calcaripeptides A-C

The first stereoselective total syntheses of marine cyclodepsipeptides, calcaripeptides A-C, have been accomplished. Emphasis was given particularly in identification of an efficient strategy for the macrocyclization. The notable features of our synthesis include Evans alkylation, Crimmins syn-aldol, Crimmins acetate aldol, Wittig olefination, and Shiina macrolactonization reactions. An anomaly in the 1H NMR of the proposed calcaripeptide B has been amended during this synthetic study. (Chemical Equation Presented).

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Oxazolidine – Wikipedia,
Oxazolidine | C3H1786NO – PubChem

 

497-25-6, Catalysts function by providing an alternate reaction mechanism that has a lower activation energy than would be found in the absence of the catalyst. In some cases, the catalyzed mechanism may include additional steps.In a article, 497-25-6, molcular formula is C3H5NO2, introducing its new discovery.

Meta-phenylenediamines, process for preparation thereof, intermediate compounds and use of these meta-phenylenediamines as couplers for the oxidation dyeing of keratinous fibres and especially human hair

New meta-phenylenediamines, process for preparation thereof, intermediate compounds and use of these metaphenylenediamines as couplers for the oxidation dyeing of keratinous fibres and especially human hair. The invention relates to the compounds of the formula: STR1 in which R1 and R2 denote, independently of one another, a hydrogen atom, a C1 -C4 alkyl radical or a C2 -C3 mono- or polyhydroxyalkyl radical, Z and Z’ denote, independently of one another, a C1 -C4 alkyl or C2 -C4 hydroxyalkyl radical, with the proviso that, when R1 and R2 simultaneously denote a hydrogen atom, Z and Z’ do not simultaneously denote a methyl radical, and to their addition salts with an acid, to a process for preparation thereof and also to their use, by way of couplers, in an aqueous vehicle, in combination with at least one oxidation dye percursor of the para type, for the dyeing of human hair. The invention also relates to the intermediate compounds of the formula: STR2 in which R’ denotes a hydrogen atom, a C1 -C4 alkyl radical, a C2 or C3 mono- or polyhydroxyalkyl radical, or an acetyl or beta-chloethoxycarbonyl radical, and z and z’ denote, independently of one another, a C1 -C4 alkyl radical.

Because enzymes can increase reaction rates by enormous factors and tend to be very specific, 497-25-6, typically producing only a single product in quantitative yield, they are the focus of active research.you can also check out more blogs about 497-25-6

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Oxazolidine – Wikipedia,
Oxazolidine | C3H137NO – PubChem

 

Chemistry is the experimental and theoretical study of materials on their properties at both the macroscopic and microscopic levels.In a patent£¬Which mentioned a new discovery about 875444-08-9, molcular formula is C12H9F6NO2, introducing its new discovery. , 875444-08-9

CETP INHIBITORS

Compounds having the structure of Formula (I), including pharmaceutically acceptable salts of the compounds, are CETP inhibitors, and are useful for raising HDL-cholesterol, reducing LDL-cholesterol, and for treating or preventing atherosclerosis. In the compounds of Formula (I), B or R2 is a phenyl group which has an ortho amine or aminomethyl substituent which is further substituted, and the other of B or R2 is also a cyclic group.

One of the oldest and most widely used commercial enzyme inhibitors is aspirin, 875444-08-9, which selectively inhibits one of the enzymes involved in the synthesis of molecules that trigger inflammation. you can also check out more blogs about 875444-08-9

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Oxazolidine – Wikipedia,
Oxazolidine | C3H2758NO – PubChem

 

Chemistry is an experimental science, and the best way to enjoy it and learn about it is performing experiments. 497-25-6. Introducing a new discovery about 497-25-6, Name is Oxazolidin-2-one

Analysis of volatile flavour compounds and acrylamide in roasted Malaysian tropical almond (Terminalia catappa) nuts using supercritical fluid extraction

Considering the importance of tropical almond nuts as a snack item, a study was conducted to identify the flavour volatiles and acrylamide generated during the roasting of the nuts. The supercritical fluid extracted flavour components revealed 74 aroma active compounds made up of 27 hydrocarbons, 12 aldehydes, 11 ketones, 7 acids, 4 esters, 3 alcohols, 5 furan derivatives a pyrazine, and 2 unknown compounds. While low levels of acrylamide (8-86 mug/kg) were obtained in the roasted nuts, significant (P< 0.05) increases occurred in concentration with increased roasting temperature and time. Carboxylic acids were the most abundant volatiles in the roasted almond nuts and less significant (P>. 0.05) concentration of acrylamide was generated with mild roasting and shorter roasting period.

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Oxazolidine – Wikipedia,
Oxazolidine | C3H719NO – PubChem

 

160695-26-1, In an article, published in an article,authors is Chachignon, Helene, once mentioned the application of 160695-26-1, Name is (R)-4-Phenyl-3-propionyloxazolidin-2-one,molecular formula is C12H13NO3, is a conventional compound. this article was the specific content is as follows.

Diastereoselective Electrophilic Trifluoromethylthiolation of Chiral Oxazolidinones: Access to Enantiopure alpha-SCF3 Alcohols

Lithium imide enolates featuring Evans? chiral oxazolidinone auxiliary were involved in diastereoselective alpha-trifluoromethylthiolation with electrophilic SCF3 donors. Diastereopure products were isolated and converted to enantiopure alpha-SCF3 alcohols without racemisation. (Figure presented.).

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Reference£º
Oxazolidine – Wikipedia,
Oxazolidine | C3H2236NO – PubChem